<!doctype>
<html>
	<head>
		<script>
let {foo,bar} = {foo:"1",bar:"2"};
console.log("1.",foo,bar)

let {x,y} = {y:"1",x:"2"};
console.log("2.",x,y)


let {bar:b,foo:a} = {foo:"1",bar:"2"};
console.log("3.",a,b)


console.log(
	[[1,2],[3,4]].map(([a,b]) => {return a + b})
)
		</script>
	</head>
	<body>
			
	</body>
</html>